Sound-reproducing machine.



A. S. B. LITTLE.

SOUND REPRODUCING MACHINE.

APPLICATION FILED $11320, 1914.

Patented Aug". 25, 1914;

WITNESSES:

ventipnal sound-box showing amodified tion, refenmee being had to theaccompany- -\vhir-ih mar or interfere with the transmisrrnn STATESPATENT OFFICE.

'- ARCHIBALD s3. LITI'LII, or x'esxvitw, TENNESSEE.

Specification citation latent.

SOUN'D REPRODUCIKG MACHINE.

Applicltion filed February in. mi. mm m 820,022.

To all 'IlJ/( 'Hlb it may; .rnnvm'n lie it known that l, Ancnusaw 5 B.Lrrrm-z, a citizen of the United States, re siding at Nashville, in thecounty of Davidson and State'ot' Tennessee, have invented certain newand useful Innirovements in SoundReproducing Machines, ofvl'iieh thefollowing is a full, clear, and exact deseriping drawings, forming apart liereof.

My invention has relation to improvements in sound reproducing machinesand it Teonsists in the novel details of construetion more fully setforth in the specification and pointed out in the claims.

In the drawings, l igure 1 is a side elev', tion of axlisk soundreprodurer showing the, application thereto of one form of my invention;Fig. 2 is an enlarged face elevation of ;'-he inventi(m pmper; Fig. 3 isa horizoi'ital eross-seetion won the line 3-3 ofl ig. 2'. Fig. 4 an edgeview of a eonform of in invention: Fi 5 is a face ele-' tional detail ofa still further Dltnlifit'flllmll. The. present inventi n isspeeilir'ally directed to improvements in sound reproducin machines(thou gh likewise lirn'iliei'dde to sound wonders) and has for itsprimary object to eliminate all sounds which are foreign to those.intended for -reprmhn-.tion from the reeord. Among such undesirahlesounds may he mentioned (1) the. metallic noises usually :u-e nipanyingth sounds reprodueed from the record. and (2) noises resulting "omimperfections in an old or \\'ol'n-nnl. record, such noises beingusually =n-t-mnpzmied hy cracking ,sounds or jars sion of the soundwaves translating the r'e rd nupr-zissvd on the record-disk or cylind ras the ease. may he.

By the use of my invention all noises, and lnwthnllhtnl vibrations Tl iiintended in) translati n and transmission. and which are f reign to andout of atulnrrnent with. the sounds ioh'ndml to h reproduced aresegregated and ahsor'owl 'hat the some heronie pravti 'allv inan'lihlmthus making! the legitimately transmitted smuuis H'lllXllh-UHLI worn therr-rdwli k. -lenr and wh l sonw. l The sunning-as of the inventi n willhe 2 best apparent from a detailed description thereof \vhieh'is asfollows 1- deferring to the drawings, and for the present to Figsf'f'aud2, B represents the bracket .upportin the horn-elbow IC, the. hunt orsoun.'l-rhaml er, 1i, and tone-arm A, the latter having pivoted theretothe s0und=box tube T which carries the soundbox 01' reprodueer S, aswell understooi'l in theart. I As further well underst od in the art,the diaphragm l of the reprodueer is coupled by an arm 2 to a plate I,which carries the needle-soclwtf l, the plate 3 hearing against thekuifeedges 5, of the plate (3 of the reprmlurer, connection between theplates being eti'eeted by mennsof adjusting screws 7, passedrespectively through lugs or lohes r: n the plate (5 and through thespring: arms 0" secured to the plate 3, the screws luring provided withjam-nuts 7' as shown. The several features deserih'ed are well known andcommon in the art. and are illustrated here more or less conventionally,

mama Aug. 1m.-

being in no wise concerned with the-present invention.

As stated at'the outset, the main object of In) invention is tosegregate and absorb all sounds and iueehanieal vihrutions whichinterfere with the free and unrestricted propagation of sound\vnves'whieh are intended to reprodime (Ir-translate the matter on therec rd-disk or plate, or equivalent renording memher. The invention maythus he appropriately termed a sound absorber, it heing understoodhowever that while it ahsorhs undesirable sound-waves and meehuniral andlnetnlllu vibrations, it is free to transmit the legitimate wavesengendered h v the reeord-plate to which the transmittm needle or stylusis applied.

.121 the form of my invention illustrated in Iiigs. 1 and 2, the usualneedle-socket 4 receives the stem 8 of a metallic cup or llan ed disk orhead 9, between which and a similar head or disk 9' is confined a.cylinder of rubber H) or equivalent resilient somul-wave ahsm-hentmaterial, the members 9, 9' lacing, maintained out of contact with urnnother by the member 10. The. disk 9' is provided with a needle-soekntll \vhieh revolves the needle r re rodueing stylus: or operating an theconventional record-dish or plate R as well uurlerstoml in t nart. nun-cw 1'2 holding-the ne dle in place in its 1,1ee,eo1

form of a rubber or equivalent stri 10, in-

terposed between the late8 and t is knifce edges 5. In this mo ifieationthe needle n is inserted into the usual socket 4-, it being understoodthat the construction illustrate in said Figs. 4 and 5, is the same asthat illustrated in Fi '1 and 2, corresponding parts being identified bythe same reference form described, and that of the modification alludedto is in the location and manner of attaching the absorber member '(10).

A In Fig. (l, the absorber member is'in the form of a; rubber orequivalent bushing 10'," inserted in the needle socket 4, the needle nbeing received by the bushing. .It will thus -he seen that the inventionis susceptible of various mrxlifications, the eneric feature thereofhowever residin in t e intrposition of 'e-suitable sound a sorberbetween the nwdle n and the sound-box or reproducer S,

or, more broadly. speaking, between the 3 needle nnnd the sound-chamberor horn'H.

Preferably, the composition of the absorber.

10 (1.0 10")is-"soft rubber, though Ijdo not wish torestrict myselfthereto, it falling within the scope and contemplation ofmy inventionto'employ any substance (preferably non-metallic) which has the capacityto tr'arisanitthesound wav'es translating the :netter on therecord-disk, and at the same time to absorb mechanical vibrations andsounds out of ntunement with, or foreign to, the record.' The substancemust possess the necessary elasticity to transmit legitimate waves,but'must at the same time so egate end absorb the undesirable waves.etallic substances are not to be eliminated if they have the propertiesnecessary to fulfil the desired function. sttachment therefore has thecapacity of ineintainin the members '1, A, E, H, and the air in t esound pa'ssug'es thereof in perfect atunement with and '60 responsivelo, the sound-waves engendered \vithinthesound-box or dianhrugm'eell S.'lhe'absorption of undesirable waves 'should be at a aihlc; sue by theneedle operating over a'ni-im rfect, crncked, or worn-out record-dis Inother words,,the interception of the-nndesirable waves should take placebefore; the

legitimate waves reach the sound-box. As to u ell understorxl in theart, the needle mend the walls of the members S. T AyEand H. aremadeyofi metal, the-needle being of steel nnd the other parts ofinstrument'bras's.

In the Clitllll8,'i-ll(3 expression f sound ab- '0 sorhin member orsound absorber? is to he .uiu erstoodas covering any material hawmg thegroperty of absorbing waves or sounds w ich'are foreign to the record,the

legitimate record-waves being of course transmitted, and, not absorbed.

'. Having described my invention what i I claim is -1. In a machine orthe character described,

Nadia-combination, a needle-support oom- 7o prising a' rubber member.terminal flenged' disks carried thereby and spaeednpart, a

stem-leading in one direction from one of the disks; and-a needle-socketleading in the :opposi'te lircction from the opposite disk 2. Inamaohine of the character described, and in combination, aneedle-support compriauur .a 'sound-ahsorber member provided withterminal metallic heads or members spaced apart, astem on one of theheads, and

a needlwsocket on the opposite head.

In testimony whereof 1 aliix my signature, in presence of two witnesses.

ARCHIBALD S. B, LITTLE. Witnesses:

.Emn Sraasrr, I 'Jos.-A. Mrc mnzt or this retest an; be obtained it: anout: each, by addressing cit commissioner o1 Esteem. 4 Gentlemen, 23. o.

oint as near the needle-psposwaves being usuallyproduced; 56

